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Earth science
| Question | Answer |
|---|---|
| What are plate tectonics? | Plate tectonics is a theory that explains the structure of the earths crust. |
| Alfred Wegener. | A German Geophysicist and meteorologist who came up with the first continental drift statement. |
| Pangaea | Pangaea was a super-continent that existed during the late Paleozoic and early Mesozoic eras. |
| Crust | The outermost layer of the Earth. |
| Lithosphere | The rigid outer part of the earth, consisting of the crust and upper mantle. |
| Asthenosphere | The upper layer of the earth's mantle, below the lithosphere. |
| Transform boundary | A transform boundary is a plate boundary where the motion is predominantly horizontal. |
| Seafloor spreading | Seafloor spreading is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge. |
| Convergent boundary | A convergent boundary is an area on Earth where two or more lithospheric plates collide. |
| Divergent boundary | a divergent boundary or divergent plate boundary is a linear feature that exists between two tectonic plates that are moving away from each other. |
| Rift valley | A large elongated depression with steep walls formed by the downward displacement of a block of the earth's surface between nearly parallel faults or fault systems. |
| Subduction | Subduction is a geological process that takes place at convergent boundaries of tectonic plates where one plate moves under another and is forced to sink. |
| Convection current | A current in a fluid that results from convection. |
| Continental Drift Theory | Continental drift is the theory that the Earth's continents have moved over geologic time relative to each other. |
| Trench | A trench is a type of excavation or depression in the ground that is generally deeper than it is wide |
| Oceanic basin | an oceanic basin may be anywhere on Earth that is covered by seawater but geologically ocean basins are large geologic basins that are below sea level. |
| Hotspot | In geology, the places known as hotspots or hot spots are volcanic regions thought to be fed by underlying mantle that is anomalously hot compared with the surrounding mantle. |
| Mid-ocean ridge | A mid-ocean ridge is a seafloor mountain system formed by plate tectonics. |
| Ring of fire | The Ring of Fire is a major area in the basin of the Pacific Ocean where many earthquakes and volcanic eruptions occur. |